Transformer.



No. 7|3.327. Patented Nov. ll, I902.

W. S. MOODY.

TRANSFORMER. (Application filed. Mar. 27, 1902.)

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UNITED STATES PATENT OFFICE.

\VALTER S. MOODY, OE SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

TRANSFORM ER.

5.?ECIFICATION forming part of Letters Patent N 0. 713,327, dated November 11, 1902.

Application filed March 27,1902. Serial 170,100,222. (No model.)

To (6717/ whom, it may concern: The transformer illustrated in the draw- Be it known that I, WALTER S. MOODY, a ings is of the three-phase air-blast type and citizen of the United States,residing at Schenis provided with three sets of windings, one ectady, county of Schenectady, State of New for each phase. One set of windings for one York, have invented certain new and useful of the phases is illustrated in section at 1, 55

Improvements in Transformers, (Case 'No. while a portion of another set of windings is 2,386,) of which the following is a specificaillustrated in section at 2, the remaining portion. tion being concealed by the outside casing of My present invention relates to transformthe transformer, consisting, as indicated, of

IO ers for alternating currents, and is particua base-casting 3 and acap-casting 4, between 60 larly useful in connection with transformers, which the core of the transformer is clamped, for multiphase alternating currents, though and the intervening inclosing walls 5. The it is to be understood that its novel features remaining winding of the transformer is enare not necessarily limited to use in this partirely concealed from View, but its illustra- [5 ticular relation. In multiphase transformers tion is unnecessary to an understanding of 65 in which the windings of one phase are the present invention. By an inspection of cated adjacent to windings of another phase Fig. 2 it will be seen that the transformeror phases, there exists the constant danger windings are entirely inclosed within the that in case of a burn-out caused by a short iron core, except the end portions, which procircuit or similar accident to the windings of ject, respectively, above and below the core, 70 one phase the resulting flames may spread as indicated at 6 and 7. These end portions from the exposed portions of the damaged are surrounded by a casing of insulatingmawinding and by making contact with the unterial,(indicated, for example, in section at 8,) damaged winding thereby cause a destrucwhich casing insulates the coils from the core.

tion of the latter winding along with the wind- To secure a permanently-eifectual barrier be- 75 ing in which the trouble originated. In case tween the windings of the several phases, I there are more than two windings it will be make use, however, of barriers of non-comseen that the trouble may be communicated bustible material. In the present instance to all of them and the entire transformer these barriers are represented at 9 and are ruined or at least greatly injured. I have formed from sheet metal bent into U shape 8c found that this difficulty may be overcome so as to inclose an air-space of poor heat conby separating the exposed portions of the ductivity, and the free ends of the sheet metal windings of one phase from the exposed porare clamped, bolted, or riveted to a ribbed tions of the windings of the other phase or member 10, forming a portion of each of the 3 5 phases, and to effect this separation I make main castings of the transformercasing. 85 use of barriers which may be cast integral These ribbed members of the cap and base with the main castings of the transformer or castings extend transversely across the castmay be formed of sheet metal and suitably ings and serve as clamping-faces, between attached to the structure of the transformer. which the core, such as at 11, is compressed.

The novel features which I believe charac Instead of separately fashioning the barriers 0 terize my invention are pointed outwith parfrom sheet metal and attaching them to the ticularity in the appended claims, while the main castings of the transformer-casing the invention itself is exemplified by an embodiflanged members of these castings may be ment thereof described in detail in the folmade of such dimensions-as to separate the 5 lowing specification and illustrated in the exposed ends of the windings of the several 5 accompanying drawings, in whichphases of the transformer.

Figure 1 is a side elevation, partly in sec- What I claim as new, and desire to secure tion, of a transformer embodying my invenby Letters Patent of the United States, is tion; and Fig. 2, an end elevation, partly in 1. In a transformer, the combination of a section, of the same transformer. plurality of sets of coils, magnetic material I00 surrounding the active portions of the windings of each set of coils, and barriers of incombustible material interposed between the exposed ends of adjacent sets of coils.

2. In a transformer, the combination of a magnetic core, coils mounted thereon so as to be separated from each other by magnetic material, and barriers of incombustible material interposed between the exposed portions of said coils.

3. In a multiphase transformer, the combination of windings for the several phases, and l metallic barriers interposed between exposed portions of adjacentwindings.

4. In a multiphase transformer, the combi- 15 nation of a magnetic core, windings for the several phases, and sheet-metal barriers between exposed portions of adjacent windings.

In witness whereof I have hereunto set my hand this 25th day of March, 1902.

WALTER S. MOODY.

Witnesses:

BENJAMIN B. HULL, HELEN ORFORD. 

